When I run `pacman -Syu`:

[julius@hand ~]$ LANG=C sudo pacman -Syu
:: Synchronizing package databases...
 libre is up to date
 core is up to date
 extra is up to date
 community is up to date
 pcr is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'python-pyqt5<5.15.1' required by qutebrowser

The bug seems similar to #2584 and #2608.